ASP.net如何给一个已知XML里填加新的节点和值？帮忙给几行代码，放80分

小弟基础比较弱，所以才斗胆来管大家要代码，实在不是懒惰，这个问题小弟查SDK，MSDN，Google 很长时间了，但是总是不会应用……

解决方案 »

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顺便把写XML的原码也贴上：—）using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Xml;
using System.Configuration;
using System.Data.OleDb;
using System.Text;namespace WriteXmlFile
{
/// <summary>
/// createxmlfile 的摘要说明。
/// </summary>
public class createxmlfile : System.Web.UI.Page
{
public OleDbConnection conn=new OleDbConnection(ConfigurationSettings.AppSettings["conn"]);
public string b;
Random a=new Random();
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.TextBox mytitle;
protected System.Web.UI.WebControls.TextBox mycontent;
protected System.Web.UI.WebControls.TextBox cat;
protected System.Web.UI.WebControls.TextBox fromwhere;
protected System.Web.UI.WebControls.TextBox image;
protected System.Web.UI.HtmlControls.HtmlGenericControl output;
protected System.Web.UI.WebControls.TextBox links;
protected System.Web.UI.WebControls.TextBox imagealign;
protected System.Web.UI.WebControls.TextBox catname;
protected System.Web.UI.WebControls.DropDownList DropDownList1;
public string cutdot=System.DateTime.Now.ToString().Replace(":","-").Replace(" ","-");
private void Page_Load(object sender, System.EventArgs e)
{
conn.Open();
if(!IsPostBack)
{
ArrayList values=new ArrayList();
values.Add("main.xsl");
values.Add("2.xsl");
values.Add("3.xsl");
DropDownList1.DataSource=values;
DropDownList1.DataBind();
}

Response.Write(DropDownList1.SelectedItem.Value.ToString());

}

public void SubmitBtn_Click(Object sender, EventArgs e)
{
StringWriter writer = new StringWriter();
Console.SetOut(writer);
createxmlfile myWriteXmlFileSample = new createxmlfile();
//myWriteXmlFileSample.Run(HttpContext.Current.Server.MapPath(DateTime.Now.ToShortDateString()+"-"+temp+".xml"));
//string cutdot=DateTime.Now.ToString().Replace(":","-");
//string cutnsp=cutdot.Replace(" ","-");
myWriteXmlFileSample.Run(HttpContext.Current.Server.MapPath("data/"+cutdot+".xml"));
output.InnerHtml = writer.ToString();


/*
for(int i=0;i<20;i++)
{
 string t=Convert.ToInt16(9*a.NextDouble()).ToString();
b +=t;
}
*/

string strSql="INSERT INTO article(cat,realurl,adddate,title,catname) VALUES ('"+HttpContext.Current.Request["cat"].ToString()+"','"+"data/"+cutdot+".xml','"+cutdot+"','"+HttpContext.Current.Request["mytitle"].ToString()+"','"+HttpContext.Current.Request["catname"].ToString()+"')"; //try
//{
OleDbCommand mycommand=new OleDbCommand(strSql,conn);
mycommand.ExecuteNonQuery();
conn.Close();
Response.Write("数据库填充完毕");

//}
//catch
//{
//Response.Write("数据库填充出错");
//conn.Close();
//}
} public void Run(string args)
{
XmlTextWriter myXmlTextWriter = null;
XmlTextReader myXmlTextReader = null;
//try
//{

myXmlTextWriter = new XmlTextWriter (args,Encoding.UTF8); myXmlTextWriter.Formatting = Formatting.Indented;
myXmlTextWriter.WriteStartDocument(false);
//string PItext="type='text/xsl' href='main.xsl'";
myXmlTextWriter.WriteProcessingInstruction("xml-stylesheet","type='text/xsl' href='main.xsl'");
//myXmlTextWriter.WriteDocType("声明",null,null,null);
myXmlTextWriter.WriteComment("此站点由Myway_Lau开发 | This Site is Created by Myway_Lau | Email:[email protected]");
myXmlTextWriter.WriteStartElement("Myway_Lau的站点");
myXmlTextWriter.WriteStartElement("文章", null);
myXmlTextWriter.WriteStartElement("标题", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["mytitle"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("内容", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["mycontent"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("分类", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["cat"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("分类名称", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["catname"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("来自", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["fromwhere"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("相关链接", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["links"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("图片", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["image"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("图片对齐", null);
myXmlTextWriter.WriteCData(HttpContext.Current.Request["imagealign"].ToString());
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("录入时间", null);
myXmlTextWriter.WriteCData(cutdot);
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteStartElement("评论地址", null);
myXmlTextWriter.WriteCData(cutdot+".xml");
myXmlTextWriter.WriteEndElement();
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// myXmlTextWriter.WriteStartElement("样式表", null);
myXmlTextWriter.WriteCData(DropDownList1.SelectedItem.Text);
myXmlTextWriter.WriteEndElement();/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////问题就出在这两个注释行之间……
这样在这里面接收不到SelectItem.Text值……

//myXmlTextWriter.WriteElementString("来自", HttpContext.Current.Request["fromwhere"].ToString());
//myXmlTextWriter.WriteElementString("图片", HttpContext.Current.Request["image"].ToString());
//myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteEndElement();
myXmlTextWriter.WriteEndElement(); //向文件写 XML 并关闭编写器
myXmlTextWriter.Flush();
myXmlTextWriter.Close();

//}
//catch (Exception e)
//{
//Console.WriteLine ("异常：{0}", e.ToString());
//} //finally
//{
//Console.WriteLine(" ");
Console.WriteLine(" 对文件 <a href='{0}'>{0} </a>的处理已完成。", args);
if (myXmlTextReader != null)
myXmlTextReader.Close();
//关闭编写器
if (myXmlTextWriter != null)
myXmlTextWriter.Close();

//}
}

#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load); }
#endregion private void TextBox2_TextChanged(object sender, System.EventArgs e)
{

}
}}
我想你的困惑可能跟我以前遇到的一样,其实只有一个要点:
你先把要添加的节点内容添加好,然后插入的时候用下面这句就行了:
xdOpen.SelectSingleNode(sbPath.ToString()).AppendChild(xeNewss);
sbPath就是指向文章节点的Xpath,xeNewss就是你自己写好的评论节点
同意楼上,但也可以用dataset读入XML文件后当数据库操作,加入新列后,写入值,然后写回XML文件,就可以了.
顶一下，上午查阅了一些资料
private void Page_Load(object sender, System.EventArgs e)
{
XmlDocument mydoc=new XmlDocument();
mydoc.Load("data/2093251.XML");
mydoc.SelectSingleNode("文章").AppendChild(？？？);
Response.Write("ok");我想把评论的内容（Html中textarea提交的内容）当做AppendChild的<评论><![CDATA[写的评论]]></评论>谢谢
查了MSDN的例子，终于找到了代码，调试了一下，成功，现把代码奉上，愿与我一样的困惑者能够调试成功using System;
using System.IO;
using System.Xml;public class Sample
{ public static void Main()
{ XmlDocument doc = new XmlDocument();
doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" +
"<title>Pride And Prejudice</title>" +
"</book>"); XmlNode root = doc.DocumentElement; //Create a new node.
XmlElement elem = doc.CreateElement("price");
elem.InnerText="19.95"; //Add the node to the document.
root.AppendChild(elem); Console.WriteLine("Display the modified XML...");
doc.Save(Console.Out); }
}